sigmodont

1 definition found

sigmodont - Collaborative International Dictionary of English v.0.48 :

  Sigmodont \Sig"mo*dont\, n. [Gr. ??? sigma (?) + ???, ???, a
     tooth.] (Zool.)
     Any one of a tribe (Sigmodontes) of rodents which includes
     all the indigenous rats and mice of America. So called from
     the form of the ridges of enamel on the crowns of the worn
     molars. Also used adjectively.
     [1913 Webster] Sigmoid